Steam boiler



v May 1 E. H. VINCENT STEAM BOILER 2 Sheets-Sheet Filed June 1 1923 1/1/11!!! flllll/lllllil 1/ vs/v TR. ERNEST H. VINCENT.

ATTORNEY Patented May 28, 1929.

1,714,829- PATENT OFFICE. i

-ERNEST H. VINCENT, 0F OAKLAND, CALIFORNIA.

STEAM BOILER.

Application filed June 1, 1923. 'Serial No 642,831. I

This invention relates to steam boilers and particularly pertains to the type of boiler disclosed in my United States Letters Patent No. 1,351,500, dated August 31, 1920.

' Such a boiler is adapted for automotive and marine work and is composed of a plurality of duplicate tube units assembled to form a boiler of desired capacity wherein steam may be economically generated.

It is the principal object of the present invention to generally improve boilers of the type referred to whereby toprovide a boiler of simple and eflicient construction which is designed to expedite the circulation of water therein and operate with maximum efficiency.

The invention contemplates the use of a multiplicity of water tubes arranged in units which are connected in a novel manner to allow for expansion caused by heat; the

tubes of the units are intercoimected in a manner aflording maximum circulation of.

water therein which consequently increases the steam generating capacity thereof.

One form which the present inventionmay assume is exemplified in the following description and illustrated by way ofexample in the accompanying drawings, in which:

Fig. 1 is a view in section showing'an elevation of a boiler embodying the inventiOI'l. V V j p v Fig. 2,is a side elevation ofthe same.

Fig. 3 is a fragmentary bottom view of the boiler structure disclosing certain details of construction. 1 I

Referring to the drawings, 10 indicates a housing, here shown as rectangular in formation and providing a lower heat chamber 11 disposed beneath a boiler structure 12, and an upper chamber 13 above this boiler. A heat inlet" opening 14 communicates with the chamber 11 and an outlet opening 15 leads from the upper chamber 13, thereby providing a complete circulation of heat through the structure.

As shown in the drawings, the entire housing lO-is enclosed by an outer metal wall 1.6,

while the inner walls of thehousing are here shown as separated along lines 17 and 18 to permit the removal of the lower chamber 11 and the upper chamber 13 and to thereby allow ready access to the bottom of the boiler structure 12. and the top thereof. Angle plates 19 are utilized to secure these wall sections together by means of bolts 20.

of combined Water and heat circulating units 21. One of these units is clearly shown in- Fig. 1 and will be seen to comprise a plu rality of vertical water'tubes 24v connected to horizontal upper and lower headers 22 and 23 which latter are preferably formed rectangular in cross section.

' It will be understood that the headers 22 and 28 of the various units are arrangedat spaced distances apart in parallel relation to each other crosswise of the housingand inthis particular instance crosswise of a vehicle frame. y

Throughthe lower wall of each tube 22 a plurality of small openings 25 are formed. These openings receive flue tubes 26 which extend upwardly'and pass through the water The boiler structure comprises a plurality 1 26 are considerably longer than the water tubes 24 and extend upwardlythrough'the upper headers 23 where they are suitably expanded within openings 27 formed along the upper wall of the headers '23. Thus it will be seen that continuous communication is established between the heat chamber 11 and the upper chamber 13 and at the same time communication will be established between the'lower headers 22 andthe upper headers 23 of each boiler unit. By the expression boiler unit is implied the provision of a, lower header 22, an upper header ,23 and a plurality of heat and'water tubes, as particularly shown in'Fig. 1.

{eferring particularly to Fig. 3, it" will be noted that openings 28 are formed through the opposite side walls of each of the lower headers 22 at one end thereof only. These openings are circumscribed by cylindrical hollow'bosses 28' formed on the headers. The bosses at the'contiguous sides of the lower headers unite and their length To prevent 'leakagejat the joint between the I bosses, a gasket is interposed therebetween. 1

The opposite ends of'the lower headers are connected. by shortpipes 29 to a mud drum 30 which will serve asa communication be."

tween the boiler units and also to collect any 5 represents thesp'ace between the headers;

willbe in constant communication and a by a tie-bolt 31 extending through one end of the lower headers and through the bosses 28 as shown in Figs. 1 and'3. This bolt when tightened insures that all the bosses 28 will .be held firmly together without leakage of water through their oints.

f At the other ends of the lower. headers, spacer blocks 32 are provided to maintain a desired spacing between the lower headers. These spacer blocks are mounted in a manner permitting relative movement of the boiler units to allow for expansion when they be come heated. j

Thetubes of each unit are arranged in sets and the tubes of each set are interconnected intermediate the headers 2:2 and 23 by short. horizontal tubes '33. These short tubes create. water columns of unequal weight and unevenness of heat exchanging surfaces and therebymaterially increase the circulation ef the water n the boiler and also serve bafiles to deflect the upwardly movinghcated gases from the compartment 11 so as to obtain a maximum heat exchange in the boiler. It is understood that it is within the scope ofthe present invention to vary the number of horizontal tubes employed. and thelnumber of vertical tubes in each set. The headers 23 are formed with openings for receivingoutiet pipes 34; These pipes are led to the opposite heads of steam drums 35. In the present instance two such drums are shown as mounted upon saddles 3G and enclosed within the upper chamber l3.

These drums are connectedby means of pipes which in turn are secured to a connection 38. This connection communicates with a superheaterinlet manifold 39 which is connected to a plurality of superheater coils 4.0.

The coils are disposed one in each space between the boiler units and are all connected to a discharge manifold 41. A pipe/42 is connecte'dwvith this manifold and may be led to a suitable point for delivering the superheated steam to an engine; l V

It is obvious that thesuperheater coilswill. also serve to deflect the upwardly traveling heated gases and retard their progress so as to obtain maximum exchange therefrom.

In the operation of the present invention,

the'boiler is filled with watersubstantially to the line indicated at A. 1 This operation may be produced through any suitable con-. nection although not shown in the drawings;

Heat is then admitted to the chamber 11 and will pass upwardly through the flue tubes and around the water "tubes. It is obvious that the superheater coils and the horizontal'connections between the tubes will act as baffle means to deflect the heated gases and thereby cause a maximum heat exchange in boiler structure. Steam will thus be generated and conveyed through pipes to the steam drums and thence to the superheater coils, from where it may be drawn off as desired. Any sediment and sand in the water such as to permit slight relative movement between the units to permit them to expand when heated.

To increase the efiiciency of the operation of the boiler it is preferred that the combined area of the openings between the lower headers be made three and one quarter times the combined area, of the open ends of the flue tubes.

While I h av shown the preferred form of the invention, it is to be understood that various changes, in its construction maybe 7 made without depa ting from the invention as defined in the appended claims.

Having thus described my invention, what. ,I claim and desire to secure by Letters Patent is 1. A steam boilercomprising a plurality of boiler units, each unit having horizontally extending upper and lower headers, sets of water tubes extending between the headers, the tubes of each set being connected by water circulating connections intermediate the headers, other tubes extending between the headers intermediate the sets whereby water columns of unequal weight will be formed in each unit, and flue tubes extending upwardly through certain of the water tubes.

2A. steam boiler comprising a plurality of boiler units, each unit having horizontally extending upper and lower headers, sets of water tubesextending between the headers, each set comprising three tubes, horizontal water circulating connections between the tubes of each set intermediate the headers,

independent tubes extending "between the headers intermediatethe sets of tubes, flue 'tubes extending through two of the tubes of each set and through some of the independent tubes.

ERNEST vinenyr 

